Tension-compensator for doubling machinery.



P. HARDMAN.

TENSION GOMPENSATOR FOR DOUBLING MACHINERY. APPLICATION FILED FEB. 5, 1908.

908,255. Patented Dec.29,1908.

3 SHEBTS-SHEET 1.

W a W 3331/ 361 0110 M a m 1 P.- HARDMAN.

v TENSION OOMPENSATOR FOB DOUBLING MACHINERY.

APPLICATION FILED IBB. 5, 1908.

908,255. Patented Dec. 29, 1908.

3 SHEETS-SHEET 2 P. HARDMAN.

TENSION GOMPENSATOR FOR DOUBLING MACHINERY.

APPLICATION FILED FEB. 5, 1908.

Patented Dec. 29, 1908.

3 SHEETS-SHEET 3.

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HARDMAM, r- IMA T comm nce;-

Specification of 'Iietters Patent.

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Patentedliee. 29, mos} Application filed February 5, 1908. SerlahNo; 416,884;

ture and particularly to a machine for doublingg e yarn 1n the manufacture of threa The object of the invention is to provide means for-equalizing the tension of the severalstrandsofyarnas they run from the sup 1y bobbins tothespool on which they are: eing wound.

In the: accompanying. drawings, Figure-=1 is1a diagrarnmatio view' inperspective; (30H:- ventionally'illt; strating my-"invention in use. hig. 2ris '-a'-front elevation of the tension mechanism, on a relatively enlarged scale. 1 ig. 3 is a sectional view of big. 2 on the plane. of line x-w. big. 4 is a sectionalviewon the plane of the line 'y-y.

1 1 are-spindles.

Zisthe lowerspindle rail.

3ris=-the-up spindle rail.

Each spine has anupward extension ar ranged to carry the bobbins 51's a supporting rod overwhich leads-afterleaving the bobbins-4.

6-45: arebrakes arranged to hear I tivelyagainst cylindrical enlargements Z-T ohthe. spindles 1+1- Eaeh of-"these brakes 6 is .carr1ed by abrake bar or arm' 8, i-voted for exarnple, therlowerrail 2, as s own; at

the yarn 10-10 are loop wires leadingfrom each of: the brake-bars and suitably connected thereto. In the end of each ofithese wires 10 is'an eye 11. These eyes 11 are arranged below the supporting rod 5.

12-12 are rop wires. 13 is a carrier for said drop wires.

14 1's a pulley guide.

15 is'a-spool.

16 is a thread guide carried by traverse bar 17. The thread guide is located between: the ul'ley 14-- and spool 15. The spook 15 is :riven. .in-. any suitable; way; for enample; by a-drivingdrum 18:

The? so -calleddoubled-V yam-is wound. upon the:- spool .15, and .theiparticularrneans for ginding'theyarn-'or-:d1iving the 'spool is immaterial. In threading the apparatus-the yarn- 1s=led from the bobbins-over the-sup portlng-rod 5. It-isthen looped through the eyes 11 in the brake Wires, thencethrough the drop wires 12 overthe pulley 14, through; guide 16, to spool 15. T e yarn is drawn rom the bobblns 4 by the alley spool 15*.-

lf, for any reason, oneoi the splndles 1- should turnless freely than another, it

would tend to put more tension-u-pon that.

strand leading from the bobbins carried thereby. It is-to effectively compensate-for this: uneven condition'amhto" secure a uniform tension of the several; strands being doubled, that this-inven tion is designed; To that end I provide a means whereby the brakes 6-6''6 will: be under the controlv ofi the respective-strands;

19 is a bracketcalrying a"suita1ble=spri-ng{ mechanismarranged to bearagainst the several'b'rake barsS with a inn-form "re'ssu-rei; In the particular form' shown, asing e 'sprin'g 20-is employed.

2-1 is a tension adjusting sorew;

The spring 20 works against a larger-122.,- which carries atits forward end a' hinged cross'bar 23. 1

24-44 are two bridging bars arranged te' span the gaps betweenthe brake 'bars- 8; being supported on-thebars respectively by pins 2525. The endsof the'hinged; cross ar 23" engage in sockets 2&*26 on the:- bridging-bars 24 in such amanner asito fer the pressure'ofi the spring 20 first to the bridging bars and thenceto the brake-bars 8=8'-. The-faces of the=brakes proper may: be provided with any desired" material, suchas leather.

In normal operation each of-- the brakes bears lightly and uniformly against the cylindricalpart 7- ofthe spindle; If for any reason the tension of the yarn-leading from any one of the bobbins 1s greater than it should be, this increased tension will have the eflect of drawing its-respective brakeshoe away from the cylindrical part 7 of thef spindle, thus letting it run more freely and immediately giving'up the necessary-slack t'orovide a tension uniform with the strands eading from the other bobbins; This draw ingbaekgof one brake-shoe forcesthe' plunger 2% against'springj 20 andincreases the tension This additional tension willof the latter. y Y obviously be distributed back' througli=the bridging bars of the other brake lever or levers inthe groove, thereby slightlyin equalize and:

creasing the tension on the other spindle,

- tending to retard their action for the 'mosponsive equalizing action is attained.

ment. By this means a very quick and r:-

i; will always be impossible to secure a plurality of spindles in a machine of this type which will run with absolutely the same freedom. This is one cause of variation in tension. Furthermore, variations in the amount of yarn on the 'difierent spindleswill always tend to produce a-relative variation in tension of strands leading therefrom. This would come about 'by the diflerent. speeds of the bobbins, owing to the dinerent diameters, determined by the bulk of thread thereon. These and other causes in. ma-

chines of this character will always produce variations in tension of the strands leading from the bobbins, so that it is only .by the addition of a compensating and tensionequalizing means such as described herein,

or an equivalent device, that uniformity of tension in' all of the strands'will be secured.

The great advantage, therefore, will be apparent to the mechanic skilled in the art,- by reason of the fact that practically all danger ofimperfect stock is ehminated by the employment of this mechanism.

must 'force back both of the bridging-bars 2424. To relieve one of the end brakes, one of the bridging-bars 24 only tilts back, as shown in dotted lines in Fig. 4. By this or an analogous arrangement the spring pressure applied to the several brakes is always uniform, and as a result the tension of each of the yarn ends leading from the bobbins will. be maintained substantially uniform.

While I have shown the mechanism in the 1rireferred form, obviously it may be modied in many res ects Without departing from the spirit an scope of the invention, for example, while three s indles are shown,

the invention is applica le where two or more are employed.

It will be noted that the tension control is effected by arranging the yarn sup ort and the eyes on the several brakes, and tlie drawing-oil means, so that the same are out of line. This variation in alinement may, of course, be modified at will, so long as a variation in tension in any one or more of the strands leading from the respective bobbins will relieve the brake action.

- What I claim is? 1. In a machine of the character described, -a

' brakes an spindles, a separate brake for each spindle,-

means cooperating with a plurality ot said brakes and controlled by the yarn leading from the said spindles to simultaneously relieve the braking action on one of said spindles and produce a relatively increased braking action on another of the spindles.

2. in a machine'of the eharacter -described, a pluralityof independent bobbin spindles, a'separate brake tor each spindle, means'cooperating with a pluralityof said brakes and controlled b the yarn leading from the said spindles to simultaneously relieve the braking action on one of said "spindles and produce a relatively increased braking action on another of the spindles, said: means including bridging mechanism extending from one brake to another.

3. In amachine of the character described, a plurality of independent bobbin spindles, a separate brake for each spindle,

-means cooperating with a plurality of said brakes and controlled by theyarn leading from the said spindles to simultaneously relieve the braking action on one of said spindles and produce a relatively increased braking action on another of the spindles,

said means including bridging mechanism extending from one brake to another, and a spring bearing on said bridging member in such a manner as to transmit its force to.

the brakes controlled thereby.

4. In a machine of the character described, a plurality of independent bobbin spindles, aseparate brake lor each spindle, means cotiperating with a plurality of said controlled bythe yarn leading from the said spindles to simultaneously relieve the braking action on one of said spindles and produce a relatively increased braking action on another of the s indles, said means includingbridging mec anism extending from one brake to another, and

an adjustable spring bearing on said bridg-- ing member in such a manner as to transmit its force to the brakes controlled thereby.

5. In a machine of the character dei scribed, a plurality of bobbin spindles, a separate brake for each spindle, means for causing said brakes to normally exert a drag on each of said spindles respectively, means for connecting the yarn leading from each spindle to its respective brake, and means whereby an increased tension on one strand will relieve the braking pressure on its respective spindle and simultaneously produce a relatively increased braking pressure on another spindle.

6; In .a machine of the character described, a plurality of bobbin spindles, a

plurality of independent bobbin l brakes eing independently controllable by spindles to produce a relative variation in the drag of the brakes upon the spindles respectively and means cooperatively connecting said brakes, whereby a relative decrease in the braking action of one brake will produce a relative increase in the braking action of another brake.

7. In a' machine of the character described, a plurality bfindependent bobbin spindles, a single. means to draw yarn from a plurality of said spindles, cooperating means to normally retard the rotation of said spindles including mechanism controllable by the several strands of yarn leading from said spindles res ectively to relieve the retarding action 0 one or more of the brakes and increase the retarding action of another brake, to compensate for any relative variation in tension in the yarnitself as it leads to the yarn drawing means. 1

8. In a machine of the character described, a plurality of bobbin spindles, a

plurality of brakes adapted respectively thereto, a bridging bar for at least two of said brakes, a tension device for said bararranged to exert pressure thereon to be transmitted thereby to said brakes, and means controllable by the am leading from said spindles whereby a ecreased braking action on one spin e produces a relatively increased breaking action on the other spindle, and vice versa.

9. In a machine of the character described, a plurality of bobbin spindles for carrying yarn, a brake for each spindle, a tension device in common'to two or more of said brakes, and means for controlling said tension device by the separate strands of yarn leading from said spmdles to produce a relative variation in the braking action on said spindles.

PETER HARDMAN Witnesses:

DWIGHT A. LYMAN, ARTHUR J. Rrcmnns. 

